mine havent failed yet and it has been like 2 years
and another one has been like 5 years now and still no problem
ive got the adjustable c arms on my truck. i was the first truck to get them. i havent exactly tested them out yet cuz my truck is still on the trailor. bubt i should be driving it this week. so far so good, they are excellent quality.
I have seen several trucks laid on 20's with DJM arms up front and not have problems with ball joints.
I'm laid on 20's w/ DJM arms just fine. i did break a ball joint once, but hat was due to locking out the ball joint hopping.
Mike, why would the ball joints lock out before you lay if you Z the frame? Sound like you just Z'd it too far